Question

Consider Hershey and Chase's famous experiment, in which they labeled phage T2 with S35 or P32....

Consider Hershey and Chase's famous experiment, in which they labeled phage T2 with S35 or P32. Suppose that after separating the phage from the bacterial cells, they found S35 (and not P32) in the bacterial cells. What would they have concluded? (1 sentence is recommended)

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Answer #1

Presence of S35 in the bacterial cells will indicate that proteins are the genetic material.

(The basis of this experiment is that the phage transfers the genetic material into bacterial cells, while leaving the remaining portion outside. It was not known whether the genetic material was DNA or protein. Radiolabelling of bacteriophage protein and DNA was done to detect which component enters the bacterial cell and take part in progeny formation. Thus, if S35 is detected in bacterial cells, it would suggest that protein is the genetic material, since, sulphur is the major component of proteins.)

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